package dsk.demo.product.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.ThreadPoolExecutor;

@Configuration
public class ThreadConfig {

    @Bean(name = "MyExecutor")
    ThreadPoolTaskExecutor getDataHandleExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        int threadNumber = 10;
        // 设置核心线程数
        executor.setCorePoolSize(threadNumber);
        // 设置线程队列大小
        executor.setQueueCapacity(threadNumber * 20);
        // 设置线程最大线程数量
        executor.setMaxPoolSize(threadNumber * 2);
        // 设置最大线程空闲时间,达到最大空闲时间则自动销毁
        executor.setKeepAliveSeconds(60);
        // 设置线程池名称前缀
        executor.setThreadNamePrefix("MyExecutor");

        /*
         * rejection-policy：当pool已经达到max size的时候，如何处理新任务
         * CALLER_RUNS：不在新线程中执行任务，而是有调用者所在的线程来执行
         */
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        // 初始化
        executor.initialize();
        return executor;
    }

}
